331322487137 has 2 divisors, whose sum is σ = 331322487138. Its totient is φ = 331322487136.

The previous prime is 331322487131. The next prime is 331322487151. The reversal of 331322487137 is 731784223133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 248199254416 + 83123232721 = 498196^2 + 288311^2 .

It is a cyclic number.

It is not a de Polignac number, because 331322487137 - 2⁶ = 331322487073 is a prime.

It is not a weakly prime, because it can be changed into another prime (331322487131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165661243568 + 165661243569.

It is an arithmetic number, because the mean of its divisors is an integer number (165661243569).

Almost surely, 2^331322487137 is an apocalyptic number.

It is an amenable number.

331322487137 is a deficient number, since it is larger than the sum of its proper divisors (1).

331322487137 is an equidigital number, since it uses as much as digits as its factorization.

331322487137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 44.

The spelling of 331322487137 in words is "three hundred thirty-one billion, three hundred twenty-two million, four hundred eighty-seven thousand, one hundred thirty-seven".